Champeau is particularly interested in treating incontinence complicated by birth defects such as posterior urethral valve, bladder exstrophy, prune belly and neurogenic bladder as well as the urologic evaluation of children in need of a kidney transplant. She participates in research and teaching as well as caring for patients and their families. She has attended and presented at urology conferences worldwide. She is a member of the American Academy of Pediatrics Section on Urology Nurse Specialists, for which she's held various board positions.